Upright type vacuum cleaner

ABSTRACT

An upright type vacuum cleaner is provided that includes a cleaner body having a body duct; a suction nozzle rotatably disposed at a lower portion of the cleaner body and having a brush duct; and a connecting duct having a smooth inner surface to connect the body duct with the brush duct so that when the cleaner body rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 U.S.C. § 119(e) of U.S. provisional application No. 60/964,676, filed Aug. 14, 2007 in the United States Patent & Trademark Office, and claims the benefit of under 35 U.S.C. § 119(a) of Korean Patent Application No. 2007-93886 filed Sep. 14, 2007 in the Korean Intellectual Property Office, the disclosures of both of which are incorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates to a vacuum cleaner. More particularly, the present disclosure relates to an upright type vacuum cleaner.

2. Description of the Related Art

Generally, vacuum cleaners may be classified into an upright type vacuum cleaner and a canister type vacuum cleaner.

The canister type vacuum cleaner has an extension pipe assembly to connect a suction nozzle and a cleaner body so that the suction nozzle can freely move with respect to the cleaner body.

The upright type vacuum cleaner is formed so that a cleaner body can pivot within a range of a predetermined angle with respect to the suction nozzle. A contaminants suction port for drawing in contaminants with air from a surface to be cleaned is formed on a bottom surface of the suction nozzle. The cleaner body has a vacuum generator for generating a suction force and a contaminant collecting apparatus that separates and collects contaminants from the drawn-in air. The contaminants suction port of the suction nozzle and the contaminant collecting apparatus of the cleaner body are connected with each other by a duct so that the contaminants and air drawn in the contaminants suction port move to the contaminant collecting apparatus of the cleaner body via the duct.

When cleaning using the upright type vacuum cleaner, a user grasps a handle disposed at the cleaner body, angles the cleaner body by a predetermined angle with respect to the suction nozzle, and then, pushes the cleaner body. Also, when the upright type vacuum cleaner is not used, the upright type vacuum cleaner is retained, as the cleaner body is substantially perpendicular to the suction nozzle. That is, the upright type vacuum cleaner is formed so that the cleaner body can rotate by a predetermined angle with respect to the suction nozzle. Therefore, some portion of the duct connecting the suction nozzle and the cleaner body is made of a flexible hose so that the cleaner body can rotate by a predetermined angle with respect to the suction nozzle.

However, when the flexible hose is used as the duct connecting the suction nozzle and the cleaner body, the flexible hose may be clogged with the drawn-in contaminants. In other words, the contaminants such as pins, toothpicks, etc. are caught in prominence and depression portion forming furrows in an inner surface of the flexible hose, and then, long contaminants such as thread, hair, etc. are piled up thereon, thereby blocking the flexible hose.

Also, because the flexible hose has the inner surface formed in prominence and depression portion, a suction force may be decreased and noise may be increased compared of a hose having a smooth inner surface.

Furthermore, the flexible hose has less stiffness so that it may be easily contorted while cleaning. When the flexible hose is contorted, the drawn-in contaminants cannot pass through the flexible hose so that a performance of the upright type vacuum cleaner is lowered.

SUMMARY OF THE INVENTION

The present disclosure has been developed in order to overcome the above drawbacks and other problems associated with the conventional arrangement. An aspect of the present disclosure is to provide an upright type vacuum cleaner capable of preventing a connecting portion between a body duct of a cleaner body and a brush duct of a suction nozzle from being blocked and minimizing drop of suction force and increase of noise.

The above aspect and/or other feature of the present disclosure can substantially be achieved by providing an upright type vacuum cleaner, which includes a cleaner body having a body duct; a suction nozzle rotatably disposed at a lower portion of the cleaner body, and having a brush duct; and a connecting duct having a smooth inner surface, and to connect the body duct with the brush duct so that when the cleaner body rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.

At this time, the cleaner body may be formed to rotate on a first rotating axis with respect to the suction nozzle; and the connecting duct may be formed so that a rotating center of the connecting duct on which the body duct rotates with respect to the brush duct is located coaxially with the first rotating axis.

Also, a center axis of the body duct of the cleaner body may be spaced apart from a center axis of the brush duct of the suction nozzle.

The connecting duct may include; a first connecting pipe connected with the body duct; and a second connecting pipe disposed at the suction nozzle, and having a first end thereof connected with the brush duct and a second end thereof rotatably connected with the first connecting pipe.

Also, the first connecting pipe may include an expanding portion in which the second end of the second connecting pipe is inserted, and a sealing member is disposed between the second connecting pipe and the expanding portion of the first connecting pipe.

A fixing portion may be formed on an outer circumferential surface of the second end of the second connecting pipe, and fixes the sealing member.

The sealing member may be an O-ring.

According to another aspect of the present disclosure, an upright type vacuum cleaner may include: a suction nozzle having a brush duct to fluidly communicate with a contaminants suction port; a body supporting member rotatably disposed at the suction nozzle; a cleaner body detachably disposed at the body supporting member, and having a body duct; and a connecting duct having a smooth inner surface, and to connect the body duct with the brush duct so that when the body supporting member rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.

At this time, the connecting duct may include; a first connecting pipe disposed at the body supporting member; a second connecting pipe disposed at the suction nozzle, and connected with the brush duct; and a rotating portion formed between the first connecting pipe and the second connecting pipe to allow the first connecting pipe to rotate with respect to the second connecting pipe.

Also, a center axis of the rotating portion of the connecting duct may be located coaxially with a first rotating axis on which the body supporting member rotates with respect to the suction nozzle.

The rotating portion may include; an expanding portion formed at an end of the first connecting pipe or at an end of the second connecting pipe; an inserting portion formed at the end of the second connecting pipe or at the end of the first connecting pipe to be inserted in the expanding portion; and a sealing member disposed between the expanding portion and the inserting portion to seal between the expanding portion and the inserting portion.

Also, a fixing portion to fix the sealing member may be formed on an inner circumferential surface of the expanding portion or an outer circumferential surface of the inserting portion.

The connecting duct may be formed so that air entering from the brush duct flows parallel to the first rotating axis to the body duct.

Other objects, advantages and salient features of the disclosure will become apparent from the following detailed description, which, taken in conjunction with the annexed drawings, discloses preferred embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view illustrating an upright type vacuum cleaner according to an exemplary embodiment of the present disclosure when it is not in use;

FIG. 2 is a partial rear perspective view illustrating the upright type vacuum cleaner of FIG. 1;

FIG. 3 is a partial sectional view illustrating a hinge connection between a body supporting member and a suction nozzle of the upright type vacuum cleaner of FIG. 2;

FIG. 4 is a perspective view illustrating a body supporting member of the upright type vacuum cleaner of FIG. 1;

FIG. 5 is a perspective view illustrating a suction nozzle of the upright type vacuum cleaner of FIG. 1;

FIG. 6 is a perspective view illustrating the suction nozzle of FIG. 5 to which a body supporting member is assembled;

FIG. 7 is a perspective view illustrating the upright type vacuum cleaner of FIG. 1 when a cleaner body thereof is pivoted at a predetermined angle with respect to a suction nozzle thereof;

FIG. 8 is a perspective view illustrating only the suction nozzle thereof when the cleaner body of the upright type vacuum cleaner of FIG. 1 is pivoted as illustrated in FIG. 7; and

FIG. 9 is a perspective view illustrating the suction nozzle of FIG. 8 to which a body supporting member is assembled.

Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, certain exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The matters defined in the description, such as a detailed construction and elements thereof, are provided to assist in a comprehensive understanding of the disclosure. Thus, it is apparent that the present disclosure may be carried out without those defined matters. Also, well-known functions or constructions are omitted to provide a clear and concise description of exemplary embodiments of the present disclosure.

FIG. 1 is a perspective view illustrating an upright type vacuum cleaner according to an exemplary embodiment of the present disclosure, and FIG. 2 is a partial rear perspective view illustrating the upright type vacuum cleaner of FIG. 1.

Referring to FIGS. 1 and 2, the upright type vacuum cleaner 1 according to an exemplary embodiment of the present disclosure includes a cleaner body 10, a body supporting member 30, and a suction nozzle 50.

The cleaner body 10 includes a vacuum generator 11, a contaminant collecting apparatus 13, and a body duct 20.

The vacuum generator 11 generates a suction force, and generally uses a motor assembly where a motor is formed integrally with an impeller. The vacuum generator 11 is disposed at a lower portion of the cleaner body 10.

The contaminant collecting apparatus 13 is an apparatus that separates and collects contaminants from air drawn-in by the suction force of the vacuum generator 11, and can use various types of contaminant collecting apparatuses such as a cyclone contaminant collecting apparatus, a dust bag, etc. The contaminant collecting apparatus 13 is disposed above the vacuum generator 11.

The body duct 20 connects the suction nozzle 50 and the contaminant collecting apparatus 13 so that the suction nozzle 50 fluidly communicates with the contaminant collecting apparatus 13, and is disposed at a rear surface of the cleaner body 10. In this exemplary embodiment, the body duct 20 may have a structure similar to that of an extension pipe assembly of a canister type vacuum cleaner. That is, the body duct 20 may include an extension pipe 21 that is detachably disposed at the cleaner body 10 and has a first end thereof to be connected with a connecting duct 40, a handle 22 disposed at a second end of the extension pipe 21, and a connecting hose 23 to connect the second end of the extension pipe 21 at which the handle 22 is disposed with an entering portion of the contaminant collecting apparatus 13.

Therefore, when the body duct 20 is mounted to the cleaner body 10, a user can grasp the handle 22 to move the upright type vacuum cleaner 1. Also, when the body duct 20 is separated from the cleaner body 10, the body duct 20 can be used similarly to the extension pipe assembly of the canister type vacuum cleaner.

The body supporting member 30 is rotatably disposed at an upper portion of the suction nozzle 50, and supports the cleaner body 10 to rotate with respect to the suction nozzle 50. The cleaner body 10 is detachably disposed on an upper surface of the body supporting member 30. Therefore, when the cleaner body 10 is disposed at the body supporting member 30, the cleaner body 10 can rotate by a predetermined angle with respect to the suction nozzle 50.

In this exemplary embodiment, the body supporting member 30 is hinge-connected to the suction nozzle 50. That is, as illustrated in FIGS. 3 and 4, the body supporting member 30 has hinge shafts 31 formed on opposite side surfaces thereof. The suction nozzle 50, as illustrated in FIGS. 3 and 8, has hinge holes 51 corresponding to the hinge shafts 31 at a rear portion thereof. FIG. 8 illustrates only one hinge hole 51. Therefore, when the hinge shafts 31 of the body supporting member 30 are inserted in the hinge holes 51 of the suction nozzle 50, the body supporting member 30, as illustrated in FIG. 9, can rotate with respect to the suction nozzle 50. At this time, the body supporting member 30 rotates on a first rotating axis C1 joining center lines of the two hinge shafts 31 disposed on the opposite side surfaces thereof. The body supporting member 30 may be disposed to rotate or pivot with respect to the suction nozzle 50 by approximately 90°.

The body supporting member 30 has, on the upper surface thereof, a receiving portion 34 to receive the cleaner body 10 and a locking member 35 to lock the cleaner body 10 to the body supporting member 30. Also, a duct groove 33 to which the connecting duct 40 is fixed is formed on a rear surface of the body supporting member 30.

The suction nozzle 50 is rotatably disposed at the lower portion of the cleaner body 10. In this exemplary embodiment, the suction nozzle 50 is disposed to rotate with respect to the body supporting member 30 disposed at the lower portion of the cleaner body 10. A contaminant suction port 52 for drawing in contaminants and air from a surface to be cleaned is formed on a bottom surface of the suction nozzle 50. A brush 54 may be disposed inside the contaminants suction port 52. A pair of wheels 55 is disposed at opposite side surfaces of the suction nozzle 50 so that the suction nozzle 50 can smoothly move along the surface to be cleaned. A brush duct 53 is disposed inside the suction nozzle 50 to form a moving passage of the contaminants and air entering from the contaminants suction port 52. A first end of the brush duct 53 may be extended to the rear surface of the suction nozzle 50.

The first end of the brush duct 53 is connected with the connecting duct 40. The connecting duct 40 connects the brush duct 53 with the body duct 20 so that the contaminants and air entering from the contaminants suction port 52 can move to the contaminant collecting apparatus 13 through the body duct 20. The connecting duct 40 has a smooth inner surface so that the drawn-in contaminants may not be caught on the inner surface thereof. The connecting duct 40 has a stiffness not to be contorted by a force applied thereto when the cleaner body 10 rotates with respect to the suction nozzle 50 or during cleaning. Also, when the cleaner body 10 rotates with respect to the suction nozzle 50, the connecting duct 40 allows the body duct 20 to smoothly rotate with respect to the brush duct 53.

In this exemplary embodiment, the connecting duct 40 includes a first connecting pipe 41 connected with the body duct 20, a second connecting pipe 42 connected with the brush duct 53, and a rotating portion 43 to connect the first connecting pipe 41 and the second connecting pipe 42 to rotate with respect to each other. As illustrated in FIG. 2, a center axis 20 c of the body duct 20 is spaced apart from a center axis 53 c of the brush duct 53. That is, the center axes 20 c and 53 c of the body duct 20 and brush duct 53 are eccentric each other. Accordingly, each of the first and second connecting pipes 41 and 42 is bent to connect the body duct 20 and the brush duct 53 that are eccentric each other. The degree of bend of each of the first and second connecting pipes 41 and 42 may be determined according to arrangement of the body duct 20 and the brush duct 53 to connect the body duct 20 and the brush duct 53.

In this exemplary embodiment, the first connecting pipe 41 is bent twice at approximately 90° as illustrated in FIGS. 5 and 8. That is, if a Z axis refers to a direction of the center axis 20 c of the body duct 20 as illustrated in FIG. 2, the first connecting pipe 41 is bent at approximately 90° in a Y direction, and is again bent at approximately 90° in a X direction. The second connecting pipe 42 is bent twice at approximately 90°, similar to the first connecting pipe 41.

The first and second connecting pipes 41 and 42 are connected using the rotating portion 43. Referring to FIG. 3, the rotating portion 43 includes an expanding portion 44 formed at an end of the first connecting pipe 41, and an inserting portion 45 formed at an end of the second connecting pipe 42 to be inserted in the expanding portion 44. A sealing member 46 may be disposed between the expanding portion 44 and the inserting portion 45 to prevent the air passing through the first and second connecting pipes 41 and 42 of the connecting duct 40 from leaking from the rotating portion 43. The sealing member 46 is fixed to a fixing portion 47 formed on an outer circumferential surface of the inserting portion 45 of the second connecting pipe 42.

Although not illustrated, the fixing portion 47 may be, alternatively, formed on an inner circumferential surface of the expanding portion 44 of the first connecting pipe 41. Also, in this exemplary embodiment, an O-ring is used as the sealing member 46. However, this should not be considered as limiting the type of the sealing member 46. The sealing member 46 may comprise various sealing members as long as the sealing member 46 can allow the first connecting pipe 41 to rotate with respect to the second connecting pipe 42 and prevent the air and contaminants from leaking between the first and second connecting pipes 41 and 42.

For allowing the cleaner body 10 to smoothly rotate with respect to the suction nozzle 50, the first and second connecting pipes 41 and 42 of the connecting duct 40 may be bent so that as illustrated in FIG. 3, the rotating center C of the connecting duct 40, that is, the center axis C of the rotating portion 43 is located coaxially with the first rotating axis C1 on which the body supporting member 30 rotates with respect to the suction nozzle 50. That is, the connecting duct 40 may be formed so that when passing through the rotating portion 43 of the connecting duct 40, the contaminants and air flow parallel to the first rotating axis C1.

In the above description, the expanding portion 44 of the rotating portion 43 of the connecting duct 40 is formed at the first connecting pipe 41, and the inserting portion 45 thereof is formed at the second connecting pipe 42. Alternatively, the expanding portion 44 may be formed at the second connecting pipe 42, and the inserting portion 45 may be formed at the first connecting pipe 41. Also, in the above description, the fixing portion 47 to fix the sealing member 46 is formed on the outer circumferential surface of the inserting portion 45 of the second connecting pipe 42. Alternatively, the fixing portion 47 may be formed on the inner circumferential surface of the expanding portion 44 of the first connecting pipe 41.

Furthermore, in the above description, the body supporting member 30 is used so that the cleaner body 10 is detachably disposed at the suction nozzle 50. However, when the cleaner body 10 does not need to be separated from the suction nozzle 50, the cleaner body 10 may be directly connected with the suction nozzle 50 without usage of the separate body supporting member 30.

When the cleaner body 10 is directly connected with the suction nozzle 50, the hinge shafts 31 inserted in the hinge holes 51 formed at the suction nozzle 50 are formed on opposite side surfaces of the lower portion of the cleaner body 10. So, the cleaner body 10 rotates on the first rotating axis C1 that is the rotating centers of the two hinge shafts 31 as described above. Therefore, if the connecting duct 40 is disposed so that the center axis C of the rotating portion 43 of the connecting duct 40 is located coaxially with the first rotating axis C1, the cleaner body 10 can smoothly rotate with respect to the suction nozzle 50. In other words, this may be considered as the body supporting member 30 of the above described exemplary embodiment that is formed integrally with the cleaner body 10.

Hereinafter, operation of the upright type vacuum cleaner 1 according to an exemplary embodiment of the present disclosure having the above-described structure will be explained in detail with reference to FIGS. 5 to 9.

When cleaning, the user grasps the handle 22 formed at the body duct 20 of the cleaner body 10, and then, angles the cleaner body 10 by a predetermined angle in a clockwise direction as illustrated in FIG. 7. At this time, the cleaner body 10 is mounted to the body supporting member 30, and the body supporting member 30 is hinge connected with the suction nozzle 50 as illustrated in FIG. 3 so that the cleaner body 10 rotates on the first rotating axis C1 by a predetermined angle in the clockwise direction with respect to the suction nozzle 50. Also, the body duct 20 is connected with the brush duct 53 using the connecting duct 40 so that the body duct 20 smoothly rotates with respect to the brush duct 53 according to rotation of the cleaner body 10.

That is, when the cleaner body 10 rotates by a predetermined angle in the clockwise direction, the body supporting member 30 disposed under the cleaner body 10 is rotated on the hinge shafts 31 in the clockwise direction to be in a state of FIG. 9. At this time, the first connecting pipe 41 of the connecting duct 40 fixed to the body supporting member 30 receives a force to rotate in the clockwise direction, so rotates with respect to the second connecting pipe 42 to be in a state of FIG. 8. The sealing member 46 is disposed between the expanding portion 44 of the first connecting pipe 41 and the inserting portion 45 of the second connecting pipe 42 so that when the first connecting pipe 41 rotates with respect to the second connecting pipe 42, the contaminants and air passing through the first and second connecting pipes 41 and 42 do not leak.

In this state, when the user turns on the upright type vacuum cleaner 1, the vacuum generator 11 disposed in the cleaner body 10 operates to generate a suction force. Contaminants and air are drawn-in the contaminants suction port 52 of the suction nozzle 50 from a surface to be cleaned due to the suction force. The contaminants and air entering the contaminants suction port 52 of the suction nozzle 50 move to the connecting duct 40 via the brush duct 53.

The contaminants and air entering the connecting duct 40 in series passes through the first connecting pipe 41, the rotating portion 43, and the second connecting pipe 42, so move to the body duct 20. At this time, the connecting duct 40 has a smooth inner surface so that the connecting duct 40 is not clogged with the drawn-in contaminants such as toothpicks, pins, etc. and has less noise compared to the flexible hose having prominence and depressions on the inner surface thereof. Also, because the center axis C of the rotating portion 43 of the connecting duct 40 is coaxially with the first rotating axis C1, the contaminants and air passing through the connecting duct 40 passes through the rotating portion 43 in a direction parallel to the first rotating axis C1, and then, enters the body duct 20.

The contaminants and air having passed through the body duct 20 enters the contaminant collecting apparatus 13 disposed in the cleaner body 10. The contaminant collecting apparatus 13 separates and collects contaminants from the drawn-in air, and discharges clean air to the vacuum generator 11. The clean air discharged from the contaminant collecting apparatus 13 passes through the vacuum generator 11, and then, goes outside the cleaner body 10.

After cleaning is completed, the user causes the cleaner body 10 to rotate in a counterclockwise direction so that the cleaner body 10 stands substantially vertical to the surface to be cleaned as illustrated in FIG. 1. At this time, the body supporting member 30 on which the cleaner body 10 is mounted rotates on the hinge shafts 31 in the counterclockwise direction. When the body supporting member 30 rotates in the counterclockwise direction, the first connecting pipe 41 of the connecting duct 40 fixed to the body supporting member 30 also rotates in the counterclockwise direction with respect to the second connecting pipe 42. Therefore, the cleaner body 10 can smoothly rotate without interference of the connecting duct 40. When the cleaner body 10 stands substantially vertical to the surface to be cleaned, each of the body supporting member 30 and the connecting duct 40 is in a state of each of FIGS. 5 and 6.

In the above description, the upright type vacuum cleaner 1 according to an exemplary embodiment of the present disclosure is used as the conventional upright type vacuum cleaner. That is, the upright type vacuum cleaner 1 is used to clean as the cleaner body 10 thereof is mounted to the suction nozzle 50 thereof. However, the upright type vacuum cleaner 1 according to an exemplary embodiment of the present disclosure can be used as a canister type vacuum cleaner. When using as the canister type vacuum cleaner, the cleaner body 10 is separated from the body supporting member 30, and the extension pipe 21 of the body duct 20 is separated from the cleaner body 10. After that, a leading end of the extension pipe 21 of the body duct 20 is connected with a canister type suction nozzle (not illustrated) so that the upright type vacuum cleaner 1 according to an exemplary embodiment of the present disclosure can be used as the canister type vacuum cleaner.

With the upright type vacuum cleaner according to an exemplary embodiment of the present disclosure as described above, the body duct of the cleaner body and the brush duct of the suction nozzle are connected using the connecting duct having a smooth inner surface so that foreign materials are not caught on the connecting duct, thereby not blocking the connecting duct. Therefore, it may not occur that a flow path of the vacuum cleaner is blocked due to the drawn-in foreign materials so that the vacuum cleaner cannot clean.

Also, the upright type vacuum cleaner according to an exemplary embodiment of the present disclosure uses the connecting duct having a smooth inner surface to connect the body duct of the cleaner body with the brush duct of the suction nozzle so that drop of suction force and increase of noise may be minimized compared of the conventional upright type vacuum cleaner using the flexible hose.

While the embodiments of the present disclosure have been described, additional variations and modifications of the embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims shall be construed to include both the above embodiments and all such variations and modifications that fall within the spirit and scope of the disclosure. 

1. An upright type vacuum cleaner, comprising: a cleaner body having a body duct; a suction nozzle rotatably disposed at a lower portion of the cleaner body, the suction nozzle having a brush duct; and a connecting duct having a smooth inner surface, the connecting duct being configured to connect the body duct with the brush duct so that when the cleaner body rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.
 2. The upright type vacuum cleaner of claim 1, wherein the cleaner body rotates on a first rotating axis with respect to the suction nozzle, and wherein the connecting duct is formed so that a rotating center of the connecting duct on which the body duct rotates with respect to the brush duct is located coaxially with the first rotating axis.
 3. The upright type vacuum cleaner of claim 2, wherein the body duct of the cleaner body comprises a center axis that is spaced apart from a center axis of the brush duct of the suction nozzle.
 4. The upright type vacuum cleaner of claim 3, wherein the connecting duct comprises: a first connecting pipe connected with the body duct; and a second connecting pipe disposed at the suction nozzle, the second connecting pipe having a first end thereof connected with the brush duct and a second end thereof rotatably connected with the first connecting pipe.
 5. The upright type vacuum cleaner of claim 4, wherein the first connecting pipe comprises an expanding portion in which the second end of the second connecting pipe is inserted, and a sealing member disposed between the second connecting pipe and the expanding portion of the first connecting pipe.
 6. The upright type vacuum cleaner of claim 5, wherein the second end of the second connecting pipe comprises a fixing portion formed on an outer circumferential surface of the second end, the fixing portion being configured to fix the sealing member.
 7. The upright type vacuum cleaner of claim 6, wherein the sealing member comprises an O-ring.
 8. An upright type vacuum cleaner, comprising: a suction nozzle having a brush duct to fluidly communicate with a contaminants suction port; a body supporting member rotatably disposed at the suction nozzle; a cleaner body detachably disposed at the body supporting member, the cleaner body having a body duct; and a connecting duct having a smooth inner surface, the connecting duct connecting the body duct with the brush duct so that when the body supporting member rotates with respect to the suction nozzle, wherein the connecting duct allows the body duct to rotate with respect to the brush duct.
 9. The upright type vacuum cleaner of claim 8, wherein the connecting duct comprises: a first connecting pipe disposed at the body supporting member; a second connecting pipe disposed at the suction nozzle, and connected with the brush duct; and a rotating portion formed between the first connecting pipe and the second connecting pipe to allow the first connecting pipe to rotate with respect to the second connecting pipe.
 10. The upright type vacuum cleaner of claim 9, wherein the rotating portion of the connecting duct comprises a center axis located coaxially with a first rotating axis on which the body supporting member rotates with respect to the suction nozzle.
 11. The upright type vacuum cleaner of claim 10, wherein the rotating portion comprises: an expanding portion formed at an end of the first connecting pipe or at an end of the second connecting pipe; an inserting portion formed at the end of the second connecting pipe or at the end of the first connecting pipe to be inserted in the expanding portion; and a sealing member disposed between the expanding portion and the inserting portion to seal between the expanding portion and the inserting portion.
 12. The upright type vacuum cleaner of claim 11, further comprising a fixing portion to fix the sealing member formed on an inner circumferential surface of the expanding portion or an outer circumferential surface of the inserting portion.
 13. The upright type vacuum cleaner of claim 12, wherein the sealing member comprises an O-ring.
 14. The upright type vacuum cleaner of claim 10, wherein the connecting duct is formed so that air entering from the brush duct flows parallel to the first rotating axis to the body duct. 